Fluid-pressure brake.



W. V. TURNER. FLUID PRESSURE BRAKE. APPLICATION vIILIED JAN. 15, 191g.

1,108,949, Patented sept. 1,1914.

N R. N Q N -l t 1 1;, 1 11,1 11 I1 l 1 v IM 1 AS 'l IS wn'NEssEs mvENToRf Brakes, of which ficatioir i V,

e This?invention relates toy fluid ypressiire` ly to a combined'A HOUSEAIR BRAKE (OlVIPAlIY,y 0F PITTSBURGH, PENNSKYLVANIAgA CORPORATION f oFPENNSYLVANIA o f1appiicatitaliueaaahaiyiiaioia-seria1No. 671,252..i L

citizen of the United States, residiiig at.

Edgewood, in the coiiiji'tv oAl'leglienyjand State of ,'Pennsyllvania;liave" inventedi'fnew y and useful Improvementsin luidePressure "thefollowing "is i speci' brakes, and more partcula automatic fand straightair brake.`

'f vVVitha-bralie equipment olitheabove tfxfpe, the brake valve"provided with positions for controlling the brakes automatically andother positions for controlling' the brakes'by means of straight airjthe automatic lbrakes being' employedv ,Whereytwo or more cars areoperated, while ystraight airis jordinarilyfem- ,ployed for orieorpossibly' two car operation.

Itis customary toarrange thefpositions of the brake valve for combinedautomatic and straight air operation as follows: automatic and straightair release* position, Lstraight .air lap,f straight'aiiapplicatiomautomatic lap, automatic service application, ,and emergencyapplication position, and with Q tliis' 'arrangement it will' be seenthatfin.y "operating the brakesl automatically, it is necessary kto passyover the straight airlposition`s in.tlie movement from automaticrele'asefjto yautomatic 'service application posi` ti'on 'ai id viceversa.L lnorder toprevent "iclow of'air tothe brake cvlinderin thus `cutout C001?? provided" in the vstraight. air "pipe,' whicliisl. closedwhen ,the brakes are passing over the straight` air positions,y a

operatedautomatioally. A cutiout cockie alsol placedinthe train pipey4connection to the brake valve;Sotlatftheltran 'Pipe` 1111er [be cutoli'from thebrakelvalve at the non operating end of the carin doubleend'equip-` ments and also on. all cars which maybe equipped with brake:valves except the opfer ating,` brake valve on the headcar.V It'some-,iinesxhappens that theoperator fails'to turnj the trainv pipe outeoutCock toitsopen' posi-'j tion at the*operating);endgof tlig car and as aconsequencethe brakesy arejnotjfapplied when. the bralie-- valve isfoperatedinfthe*` usual 50,

` viatethis' diiliculty, ithas been proposed to, provide a straight airconnection adapted manner for that purpose. In 'order toobin theautomaticeniero'ency position vt o-su1;

'plv fluid directly 'tothe brake cvliiider,*soy

tli'atif the cut-'out cock in the train' pipe?,

lbralesfmay still be" promptly obtained byl fion. featurer salsoydesirable in''case there is; anythiiifgq otherwiseoutlfof orderstemma@affamata.;l 1 raeaa sept. 11g-1914.11

y happens,mbe@10aafaaappiieaiofi 0f ae] f moving"thebrake,valve'jtoeinergencvposii y y"wit h theautomatic brake;vAsbefore'fex@ "plained, however, a cutoutcock is also pro-VVidedfinjthe' lstraighttair-pipe and if' this"v ,would be .obtainedemergency ypoSt'OIL-` The Principal Obie'Ct'fof my nventn is .t0

aride"aswebined. automa and, straight @11-br2lle'equipment "ortliefabove character haringen-Out' Cocks in thetif rire and .straightair pipe and meansffor insuring'an application "fofthe brakes"regardless of the l l y 1n the accompanvmgdrawing; Figure ly is adiagrammatic view of acombined auto. i.

matic andstraight air. brake equipment with my improvement 'appliedthereto; lQ fa plan view 'of the rotaryv'alve seatfofthe engineers'brake valvegglig. 3" aface view ofthe rotary valvevtherefor; Fig. 4; aydiagrammatic view,' showing thefrelative kpo'sitions ofthe ports'instraight airfservice ap-y f plicatiion position of fthe gbijaliei valve;and Fig. 5a similar view, showing tlie parts inlemerglgencj@applicationy positi'm;y v As shown in- Fig; Lof thedrawing,f the combined automatic and Vstraight Lair brake equipment mavl.conmorise the "usualfbralie cylinder 1, triplefvalve2,jauxiliaryreservoir '3, automatic train'pipeflanda brakevalve.

glp-reierablv one rit each end of@ thejcar.

Thebrakevalv e is Iprovided;with thek usualy i operating'handle'ilforj'actu:'igtiiierf a yrotaryvv i jvalve? and may be' provided\witlfi ltheusual 1111alizi-iig;discharge valve mechanism iSor l i 'i controllingthe ydischarge y'of 4air from the pipe' Ain v nia hing anyautomaticappli'cationf ofthe brakes.'v yT heftrain, pipe bisconne'o'tedfto a port' Qjjlea'dingto the Sei' ofthe l rotary'valve 7fand a straghtfairpipelO iS l y' y t, connected toaportllalsolea'diiigto the seat 1 00 Of the rotary valve. ,A branch pipe -12`conltainingy a cut-out cock/"13, ,OpDS into 'the' Straight pipe lQandcominuii'icatesfwith -K afport 1 4 in thejrot'ary valveseat. llhe roy@ itary valve yseat alsolia's If: 'ihaustpoit'l 1 05 yand apo-rt 19-leadiiigffto ,thegchamberfabe `the Yeq'uaiiaing'f discharge; piston andthe vrlotarv valve 7 isoprovidedgwith an exhaust Cavity; having ,anOpening. 1 6 and @anaal peningi? 'adapted to 'fegaerwithfthe ex-f haust#port 15, anthrough port 18,`and a cavity 26 connected to port opening17. .The .operating positions of the brake valve "are" arranged intheorder shown in Fig.` 2

of the drawing, viz: release, straight air lap, straight airapplication, handlefoff position,

automatic lap, automatic service application, .and emergency applicationposition. Inaue toinatic and straight air release position, the throughport 1 8 in the rotary valve 7 regisfters Witli-.thetrain-.pipeport 9,so that Huid "under pressure is `supplied to the train pipe the usualmaniier.` Port opening. 16 alsor registers with straight air port 11, so that ,the straightairfpipeflO is connected to the eihaust port 15. Ifthe'brakes are to be controlled automatically, the cut-out cock 13 isclosed and vto efiectan autoniaticapplication of ,the brakes, the brakevalve is turned to `Tauto niaticf: `service position, in [which l, theport opening 16 in the rotary valve A7'is`connected l to port 19 leadingto the chamber above the e'qualizing4 piston.

i Fluid Ais thereupon 'vented frein said chamber and theequalizingdischarge valve ,mechanisn'i isoperated inthe usual mannerto effeet a'reduction in Vtrz'tjin Vpipe pressure Yhen .the desired reduction 'is'effected, the brake valve "handle is turned ,to automatic flap"position. yIt ,the 'brakes are to be 1'erleased, thev brake .valveisturned to release position, in ivhichtluid is suppliedv to the trainpipe andthe pressure therein is Iincreased to return vthe triple valvepistons to release position. It will noiv be noted that as the c'ut-o utcock 13 is closed, no fluid ycan fiioiv, `through" the"y straight airpipe yin operating the f hrales automatically. 1f the brake valve isturned to emergency position, the portepsnils ..16 registers with .treinripe. portj), so that the train pipe pressure is 'rapidly reducedtojeHect an emergency application ofthebralies. `If-.the cutout vcock 27in thef train pipe `should happen to be closed, it is evident thatanemergency api plicatien ofthe brakes Will V not be obtained,

,butaccording to myvimlprovemen einen.

` gencyfapplication position, the through porty trois "118 Ein therotary valve 'QregiSltersj VWith the .59L i i A' plied directly to thebrake ,cylinder and an application of thefbrakes is obtained; I by'straight air porto11,.so that iuidlis kSlip-5 means of straight airQYfthusbenoted that the straight air putout cool; 13 concommunication0,1113' through 'the straightfair lsfer'vicic YVconnection, l and thatthel A, straight aireinergency piple'is' always open.:

double" `checl i valve .12A-1 controls communication from theautomaticfservice pipe 22 @thejautomatic s eri'zice'v pipe or `from ithe straight .air pipe to close communication ci: pressure in pipe 10 onthe sidey of the double y check .valve. adjacent to the brake valve notiii use, the exhaust cavity 26 in the 'rotary valve 7 .is adapted toregister with 4straight air port 11 in handle oi position. .If desired,the poition of straight air pipe leadingwfromthedouble check valve 211tothe brake valve not in use may be 'ma'intainedat atmospheric pressureby providing asmall exhaust port kin the cut-out cock 13, adapted in theclosed position of the cock to connect the pipe 1() with the atmosphere.

It Will now be evident .that While ordinairily the operator Will openeither vthe cutout cock 27 onf theliead end ofthe car for 'automaticoperation, or the straight air cutout cock-13 for straight air control,as the case maybe, if both cocks are inadvertently., "lett closed, anapplication of Athe brakes may still be Y obtained through the alwaysopen straightfaii connection -in thefemergency application position of,the brakeV valve.

` Having noviV described my invention, what 1. In a combined automaticand straight air brake, the combination with a ytrain pipe and astraightair pipe, of a brake valve pro? I claim new and desiretosecure by Let`'i .ters Patent, is:-,

ioov

`vided with a straight 'air' service port anda kstraight air emergencyport and separate pipe connections frein said ports-to the straight airpipe. I

2.1Ina combined automatic andstraighu airV brake, the combination with atrain pipe a port for straight 4air service and a portV iorjsupplyingstraight air -i'n emergency,

said ,ports having separate pi-,peponnections to .the straight rair pipeandacut-out 'cock .fin l the straight air 'service `pipe connection. lnVa combined automatic and straight fairbrake, thecoinbination withatrain pipe forcoiitrollingthe brakes automaticallyand Y a straightiairpipe, of abrale valve having for supplying straight air in .automatic`emergency position and a straight air `pipe connection containing ya`cut-out A cock for `supplyingfair .in straight air service.

4. In a combined automatic l'and[straight i vairv bralre, l`the,combination with a train pipe provided with a cutout cock andfadap'tedfor controlling lthe v'brakes Eautomatically and a .straight air pipe,ofa brakevalve-having a pipe connection with the straight air pipeprovided vvith a cut-out cock and gadapted forstraight air -service anda free open .pipe

,for ,controlling the brakesautomatically'andv Va straight air pipe, ofya brake valve having fall alivays open straightair pipe connection izoiso

connection with said straight air pipe for leading from the brakecylinder and having supplying straight air in automatic emertwo brancheseach adapted tovsupply fluid gency position. to the brake cylinder andcontrolled by the 5. The combination with a brake Valve brake valve, onebranch containing a cut- 15 and brake cylinder, of a straight air-pipeout cock and theother being always open. leading from the brake cylinderto the brake In testimony whereof I have hereunto set y .l i Valveand-having two branches forsupply- `my hand.y

ing straight air to the brake cylinder, one WALTER V. TURNER. of whichis providedwith a cut-out cock. Witnesses:

`6. The combination with a brake valve A. M. CLEMENTS, n y and brakecylinderzofy a straight air pipe CLYDE V. MGCURDY; i

Copies ofthis patent may be obtained for xre cents each, by addressingthe Commissioner of'latenrts, i

Walhiniton, D. C.

